New Delhi [India], Mar. 3 (ANI): Condemning the crude bomb attack at the RSS office in Kerala, Union Minister of Urban Development, Venkaiah Naidu on Friday questioned as to why the political parties are silent on killing of RSS activists, adding that they showed solidarity when Afzal Guru was hanged.

"Why are other parties silent on killing of RSS activists? They showed solidarity when Afzal Guru was hanged, is it not double standard?" said Naidu while addressing media here.

He further said that no party is condemning the Kerala violence and called for debate and discussion over the issue.

"What happened to intolerance? Why aren't parties speaking up? Talks about how hundreds are being killed in Kerala by Left government. Let us debate and discuss and solve issue," he added.

Earlier in the day, the RSS activists staged a protest in Hyderabad against the attack on their office in Kerala.

A crude bomb was hurled at the RSS office in Kallachy near Nadapuram last night.

At least three RSS workers sustained injuries in the attack and were rushed to the Government Medical College in Kozhikode. (ANI)